Recording medium, playback method, and playback device

Abstract

A playback method of reading out and playing streams from a recording medium is provided, in which are recorded a stream file including a first luminance video expressed by luminance of a first dynamic range, and a second luminance video expressed by luminance of a second dynamic range that is broader than the first dynamic range, and a playlist file for controlling playback of the stream file. The playback method includes, in a case of playing the first luminance video, reading out the first audio streams listed in the first combination information of the playlist file, and playing at the same time with the first luminance video, and in a case of playing the second luminance video, reading out the second audio streams listed in the second combination information of the playlist file, and playing at the same time with the second luminance video.

What is claimed is: 
     
       1. A playback method of reading out and playing streams from a recording medium, in which are recorded
 a stream file including a first luminance video expressed by luminance of a first dynamic range, and a second luminance video expressed by luminance of a second dynamic range that is broader than the first dynamic range, and 
 a playlist file for controlling playback of the stream file,
 first and second combination information, representing combinations of first and second audio streams that each can be played at the same time in a same playback section with the first luminance video and the second luminance video, being described in the playlist file, 
 the first audio streams that can be played at the same time with the first luminance video in this playback section being all listed in the first combination information, 
 the second audio streams that can be played at the same time with the second luminance video in this playback section being all listed in the second combination information, and 
 the first audio streams listed in the first combination information and the second audio streams listed in the second combination information each in the same playback section being equal, 
 
 the playback method comprising: 
 in a case of playing the first luminance video, reading out the first audio streams listed in the first combination information of the playlist file, and playing at the same time with the first luminance video; and 
 in a case of playing the second luminance video, reading out the second audio streams listed in the second combination information of the playlist file, and playing at the same time with the second luminance video. 
 
     
     
       2. The playback method according to  claim 1 ,
 wherein a number of the first audio streams is described first and attribute information for the first audio streams is described later in the first combination information, and 
 a number of the second audio streams is described first and attribute information for the second audio streams is described later in the second combination information. 
 
     
     
       3. A playback device that reads out and plays streams from a recording medium, in which are recorded
 a stream file including a first luminance video expressed by luminance of a first dynamic range, and a second luminance video expressed by luminance of a second dynamic range that is broader than the first dynamic range, and 
 a playlist file for controlling playback of the stream file,
 first and second combination information, representing combinations of first and second audio streams that each can be played at the same time in a same playback section with the first luminance video and the second luminance video, being described in the playlist file, 
 the first audio streams that can be played at the same time with the first luminance video in this playback section being all listed in the first combination information, 
 the second audio streams that can be played at the same time with the second luminance video in this playback section being all listed in the second combination information, and 
 
 the first audio streams listed in the first combination information and the second audio streams listed in the second combination information each in the same playback section being equal, 
 the playback device comprising: 
 a management information processor, that 
 in a case of playing the first luminance video, reads out the first audio streams listed in the first combination information of the playlist file, and plays at the same time with the first luminance video; and 
 in a case of playing the second luminance video, reads out the second audio streams listed in the second combination information of the playlist file, and plays at the same time with the second luminance video. 
 
     
     
       4. The playback device according to  claim 3 ,
 wherein a number of the first audio streams is described first and attribute information for the first audio streams is described later in the first combination information, and 
 a number of the second audio streams is described first and attribute information for the second audio streams is described later in the second combination information.